body{
    margin-top: 50px;
}
#fileUpdater{
    margin-top: 30px;
    box-shadow: 0 0 3px black;
}
#fileUpdater input, #fileUpdater button{
    width: 100%;
}
.main{
    background-color: rgba(255, 255, 255, 0.50);
    box-shadow: 0 0 3px black;
}
html, body, .main{
    height: 100%;
}